I'm going into my Junior year of high school and as of now I am worrying about what I have to do to get into the university of my choice. Until recently I haven't heard of the USAMO of Physics Olympiad competitions that would make me stand out, and I am not sure if I will be able to do them. I...
I have recently wondered how water can dry at normal, livable temperatures, but its boiling point is 373.15K. Is there a difference between drying water and boiling it into a gas?
Thanks, guys! I enjoy thinking about Physics, and it has become one of my hobbies. I hope to study Physics in college, and then go on to work in Astrophysics and other forms of Theoretical Physics, since it is the big questions that amaze me.
I have only recently gotten interested in Physics on...
And, sort of related to this topic, do you guys have a place where I can find the most reliable sources of equations for stuff on Black Holes, SPecial and General Relativity, and all other important Physics equations (I know the Classical Mechanics Motion equations) that is other than this...
I have heard that in space, there is no absolute reference frame.
However, let's take everything away except for two objects.
One object is going in one direction at some considerable amount of C, say 0.9 C, and the other object is coming in the opposite direction at 0.9 C.
I know that if...
You can think of light in the particle sense as an important man walking in a room. If he is just walking through an empty room, he is not really affected, as in, he is not bouncing around. If he just made an important speech, he will be shaking peoples hands a lot, just bouncing around, always...
I know that one of Goldbach's conjectures is that every even number is the sum of 2 primes.
So, I was wondering if there was a definite, largest prime number ever possible. I know that as a number gets larger, there are more numbers that can be tried to divide it (At least I think so), and I...
I know that for a rocket ship to escape Earth's gravity, it must be going at least 17,500 mph, or else it won't go into orbit.
For a black hole, light can't escape because a black hole's escape velocity is faster than c.
But why is there an escape velocity for objects with mass?
Why could...
I have a question about FTL speed.
If not even light can escape most black holes because a black hole has too high of an escape velocity, is that implying that maybe the gravity is exceeding something? Does that mean that there can't be higher velocities, with velocity being a vector, but there...
If you were going around a merry go round with a radius of 15 meters at a velocity of 8 m/s, this is how you would calculate the G-forces.
8^2=64
64/15=approximately 2.67.
So now, you have your m/s^2 for the acceleration.
2.67/9.8 m/s^2 (9.8 m/s^2 is the acceleration of the Earth's...
Well, let's hypothetically say that the pulses through your nerves from your brain were instantaneous, ruling out the speed of light for that motion. Or, choose to say that every single nerve pulse took exactly the same amount of time to send the direction to your leg to move. I am not saying I...
Thanks a lot, I think I understand the 4 vector topic that you described. I see how that if one of the variables in the 4 Velocity vector changes, it still has a constant length for the vector.
Lol, forgive me for being a little slow, for I am only a freshman in high school, and the extent of...
Well, you all know that it is most probably true that one of your legs has moved more than the other, and the other less. I am not saying there is really much of a difference, since you move your legs about the same for each when you walk, and they take about the same steps each per walk, but...
Hello, I have been wondering about this for a bit of time now, but forgive me for not being entirely clear with this, if that does happen.
I once heard that the relativity of space and time is like a graph. If you are not moving in space, that does not affect your time, with space being on...
Forgive me for a not very detailed comment, because I haven't had any formal education of The Theory of Relativity, and I am relatively new to this forum.
I would think that everything is moving at different velocities, and that affects the time. Why would we just have slower rates of time...
Oh, wait, I think I've got it.
Maybe if you shot a beam of light with a picture in it, the picture would stay the same as it was when it started traveling from the point of where it was shot from, so the frame stays constant? Though, When if an object was at the speed of light exactly, its time...
yes, I understand what you mean by that. Now, I heard that if you have a graph, and you show a point not moving through space, with space being Y and Time being X, your X, and in this case, rate of X will decrease. So, technically, if you are moving through space at the speed of light, then you...
Hi, I'm actually really glad to be submitting my own post on PF, and I have always been wondering about how the theory of relativity affects how light travels through time.
If you look at a person, you will see that the faster they move through space, the slower they move through time (At an...